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<h1>src/qvip/qvpolyline.cpp</h1><a href="qvpolyline_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> *      Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012. PARP Research Group.</span>
<a name="l00003"></a>00003 <span class="comment"> *      &lt;http://perception.inf.um.es&gt;</span>
<a name="l00004"></a>00004 <span class="comment"> *      University of Murcia, Spain.</span>
<a name="l00005"></a>00005 <span class="comment"> *</span>
<a name="l00006"></a>00006 <span class="comment"> *      This file is part of the QVision library.</span>
<a name="l00007"></a>00007 <span class="comment"> *</span>
<a name="l00008"></a>00008 <span class="comment"> *      QVision is free software: you can redistribute it and/or modify</span>
<a name="l00009"></a>00009 <span class="comment"> *      it under the terms of the GNU Lesser General Public License as</span>
<a name="l00010"></a>00010 <span class="comment"> *      published by the Free Software Foundation, version 3 of the License.</span>
<a name="l00011"></a>00011 <span class="comment"> *</span>
<a name="l00012"></a>00012 <span class="comment"> *      QVision is distributed in the hope that it will be useful,</span>
<a name="l00013"></a>00013 <span class="comment"> *      but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00014"></a>00014 <span class="comment"> *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span>
<a name="l00015"></a>00015 <span class="comment"> *      GNU Lesser General Public License for more details.</span>
<a name="l00016"></a>00016 <span class="comment"> *</span>
<a name="l00017"></a>00017 <span class="comment"> *      You should have received a copy of the GNU Lesser General Public</span>
<a name="l00018"></a>00018 <span class="comment"> *      License along with QVision. If not, see &lt;http://www.gnu.org/licenses/&gt;.</span>
<a name="l00019"></a>00019 <span class="comment"> */</span>
<a name="l00020"></a>00020 
<a name="l00024"></a>00024 
<a name="l00025"></a>00025 <span class="preprocessor">#include &lt;iostream&gt;</span>
<a name="l00026"></a>00026 <span class="preprocessor">#include &lt;float.h&gt;</span>
<a name="l00027"></a>00027 
<a name="l00028"></a>00028 <span class="preprocessor">#include &lt;qvmath.h&gt;</span>
<a name="l00029"></a>00029 <span class="preprocessor">#include &lt;<a class="code" href="qvdefines_8h.html" title="File from the QVision library.">qvdefines.h</a>&gt;</span>
<a name="l00030"></a>00030 <span class="comment">//#include &lt;qvmatrixalgebra.h&gt;</span>
<a name="l00031"></a>00031 
<a name="l00032"></a>00032 <span class="preprocessor">#include &lt;QVPolyline&gt;</span>
<a name="l00033"></a>00033 <span class="preprocessor">#include &lt;QVPolylineF&gt;</span>
<a name="l00034"></a>00034 
<a name="l00035"></a>00035 QVPolyline::QVPolyline(<span class="keyword">const</span> <span class="keywordtype">int</span> estimatedSize): QList&lt;QPoint&gt;(),
<a name="l00036"></a>00036         closed(false), direction(false)
<a name="l00037"></a>00037         {
<a name="l00038"></a>00038         qDebug() &lt;&lt; <span class="stringliteral">&quot;QVPolyline()&quot;</span>;
<a name="l00039"></a>00039 
<a name="l00040"></a>00040         <span class="keywordflow">if</span> (estimatedSize &gt; 0)
<a name="l00041"></a>00041 <span class="preprocessor">                #ifdef QT_MIN_VERSION_4_7</span>
<a name="l00042"></a>00042 <span class="preprocessor"></span>                QList&lt;QPoint&gt;::reserve(estimatedSize);
<a name="l00043"></a>00043 <span class="preprocessor">                #else</span>
<a name="l00044"></a>00044 <span class="preprocessor"></span>                Q_WARNING(<span class="stringliteral">&quot;cannot reserve a size for Qt versions older than 4.7&quot;</span>);
<a name="l00045"></a>00045 <span class="preprocessor">                #endif // QT_MIN_VERSION_4_7</span>
<a name="l00046"></a>00046 <span class="preprocessor"></span>
<a name="l00047"></a>00047         qDebug() &lt;&lt; <span class="stringliteral">&quot;QVPolyline() &lt;~ return&quot;</span>;
<a name="l00048"></a>00048         };
<a name="l00049"></a>00049 
<a name="l00050"></a>00050 QVPolyline::QVPolyline(<span class="keyword">const</span> <a class="code" href="classQVPolyline.html" title="Polyline representation.">QVPolyline</a> &amp;polyline): QList&lt;QPoint&gt;(polyline),
<a name="l00051"></a>00051         closed(polyline.closed), direction(polyline.direction)
<a name="l00052"></a>00052         {
<a name="l00053"></a>00053         qDebug() &lt;&lt; <span class="stringliteral">&quot;QVPolyline(const QVPolyline &amp;)&quot;</span>;
<a name="l00054"></a>00054         qDebug() &lt;&lt; <span class="stringliteral">&quot;QVPolyline(const QVPolyline &amp;) &lt;~ return&quot;</span>;
<a name="l00055"></a>00055         };
<a name="l00056"></a>00056 
<a name="l00057"></a>00057 QVPolyline::QVPolyline(<span class="keyword">const</span> <a class="code" href="classQVPolylineF.html" title="Floating point polyline representation.">QVPolylineF</a> &amp;polyline): QList&lt;QPoint&gt;(),
<a name="l00058"></a>00058         closed(polyline.closed), direction(polyline.direction)
<a name="l00059"></a>00059         {
<a name="l00060"></a>00060         <span class="keywordflow">foreach</span>(QPointF pointf, polyline)
<a name="l00061"></a>00061                 {
<a name="l00062"></a>00062                 append( QPoint(pointf.toPoint()) );
<a name="l00063"></a>00063                 }
<a name="l00064"></a>00064         qDebug() &lt;&lt; <span class="stringliteral">&quot;QVPolylineF(const QVPolylineF &amp;)&quot;</span>;
<a name="l00065"></a>00065         qDebug() &lt;&lt; <span class="stringliteral">&quot;QVPolylineF(const QVPolylineF &amp;) &lt;~ return&quot;</span>;
<a name="l00066"></a>00066         };
<a name="l00067"></a>00067 
<a name="l00068"></a>00068 <a class="code" href="classQVPolyline.html" title="Polyline representation.">QVPolyline</a> QVPolyline::ellipse(uInt n, <span class="keywordtype">float</span> x, <span class="keywordtype">float</span> y, <span class="keywordtype">float</span> maxRadio, <span class="keywordtype">float</span> minRadio, <span class="keywordtype">float</span> ang)
<a name="l00069"></a>00069         {
<a name="l00070"></a>00070         <a class="code" href="classQVPolyline.html" title="Polyline representation.">QVPolyline</a> ellipse;
<a name="l00071"></a>00071         <span class="keywordtype">float</span> w = 2*PI/(n-1);
<a name="l00072"></a>00072         <span class="keywordtype">float</span> maxArg = (maxRadio+minRadio)/2;
<a name="l00073"></a>00073         <span class="keywordtype">float</span> minArg = (maxRadio-minRadio)/2;
<a name="l00074"></a>00074 
<a name="l00075"></a>00075         <span class="keywordflow">for</span> (uInt t = 0; t &lt; n; t++)
<a name="l00076"></a>00076                 ellipse.append(QPoint ( (uInt) (x + maxArg*cos(ang+w*t) + minArg*cos(ang-w*t)),
<a name="l00077"></a>00077                                                 (uInt) (y + maxArg*sin(ang+w*t) + minArg*sin(ang-w*t))
<a name="l00078"></a>00078                                                 ));
<a name="l00079"></a>00079         <span class="keywordflow">return</span> ellipse;
<a name="l00080"></a>00080         }
<a name="l00081"></a>00081 
<a name="l00082"></a>00082 <a class="code" href="classQVPolyline.html" title="Polyline representation.">QVPolyline</a> QVPolyline::rectangle(<span class="keywordtype">int</span> x1, <span class="keywordtype">int</span> y1, <span class="keywordtype">int</span> x2, <span class="keywordtype">int</span> y2)
<a name="l00083"></a>00083         {
<a name="l00084"></a>00084         <a class="code" href="classQVPolyline.html" title="Polyline representation.">QVPolyline</a> rectangle;
<a name="l00085"></a>00085         rectangle.append(QPoint( x1, y1 ));
<a name="l00086"></a>00086         rectangle.append(QPoint( x1, y2 ));
<a name="l00087"></a>00087         rectangle.append(QPoint( x2, y2 ));
<a name="l00088"></a>00088         rectangle.append(QPoint( x2, y1 ));
<a name="l00089"></a>00089         rectangle.append(QPoint( x1, y1 ));
<a name="l00090"></a>00090         <span class="keywordflow">return</span> rectangle;
<a name="l00091"></a>00091         }
<a name="l00092"></a>00092 
<a name="l00093"></a>00093 <a class="code" href="classQVPolyline.html" title="Polyline representation.">QVPolyline</a> QVPolyline::line(<span class="keywordtype">int</span> x1, <span class="keywordtype">int</span> y1, <span class="keywordtype">int</span> x2, <span class="keywordtype">int</span> y2)
<a name="l00094"></a>00094         {
<a name="l00095"></a>00095         <a class="code" href="classQVPolyline.html" title="Polyline representation.">QVPolyline</a> line;
<a name="l00096"></a>00096 
<a name="l00097"></a>00097         line.append(QPoint( x1, y1 ));
<a name="l00098"></a>00098 
<a name="l00099"></a>00099         <span class="keywordflow">if</span> (x1 == x2 &amp;&amp; y1 == y2)
<a name="l00100"></a>00100                 <span class="keywordflow">return</span> line;
<a name="l00101"></a>00101 
<a name="l00102"></a>00102         <span class="keywordtype">int</span> i,dx,dy,sdx,sdy,dxabs,dyabs,x,y,px,py;
<a name="l00103"></a>00103         
<a name="l00104"></a>00104         dx=x2-x1;      <span class="comment">// the horizontal distance of the line</span>
<a name="l00105"></a>00105         dy=y2-y1;      <span class="comment">// the vertical distance of the line</span>
<a name="l00106"></a>00106         dxabs=abs(dx);
<a name="l00107"></a>00107         dyabs=abs(dy);
<a name="l00108"></a>00108         sdx=SIGN(dx);
<a name="l00109"></a>00109         sdy=SIGN(dy);
<a name="l00110"></a>00110         x=dyabs&gt;&gt;1;
<a name="l00111"></a>00111         y=dxabs&gt;&gt;1;
<a name="l00112"></a>00112         px=x1;
<a name="l00113"></a>00113         py=y1;
<a name="l00114"></a>00114         
<a name="l00115"></a>00115         <span class="keywordflow">if</span> (dxabs&gt;=dyabs) <span class="comment">// the line is more horizontal than vertical</span>
<a name="l00116"></a>00116                 <span class="keywordflow">for</span>(i=0;i&lt;dxabs;i++)
<a name="l00117"></a>00117                         {
<a name="l00118"></a>00118                         y+=dyabs;
<a name="l00119"></a>00119                         <span class="keywordflow">if</span> (y&gt;=dxabs)
<a name="l00120"></a>00120                                 {
<a name="l00121"></a>00121                                 y-=dxabs;
<a name="l00122"></a>00122                                 py+=sdy;
<a name="l00123"></a>00123                                 }
<a name="l00124"></a>00124                         px+=sdx;
<a name="l00125"></a>00125                         line.append(QPoint( px, py ));
<a name="l00126"></a>00126                         }
<a name="l00127"></a>00127         <span class="keywordflow">else</span>    <span class="comment">// the line is more vertical than horizontal</span>
<a name="l00128"></a>00128                 <span class="keywordflow">for</span>(i=0;i&lt;dyabs;i++)
<a name="l00129"></a>00129                         {
<a name="l00130"></a>00130                         x+=dxabs;
<a name="l00131"></a>00131                         <span class="keywordflow">if</span> (x&gt;=dyabs)
<a name="l00132"></a>00132                                 {
<a name="l00133"></a>00133                                 x-=dyabs;
<a name="l00134"></a>00134                                 px+=sdx;
<a name="l00135"></a>00135                                 }
<a name="l00136"></a>00136                         py+=sdy;
<a name="l00137"></a>00137                         line.append(QPoint( px, py ));
<a name="l00138"></a>00138                         }
<a name="l00139"></a>00139 
<a name="l00140"></a>00140         <span class="keywordflow">return</span> line;
<a name="l00141"></a>00141         }
<a name="l00142"></a>00142 
<a name="l00143"></a>00143 QVPolyline::operator QVPolylineF()<span class="keyword"> const</span>
<a name="l00144"></a>00144 <span class="keyword">        </span>{
<a name="l00145"></a>00145         <a class="code" href="classQVPolylineF.html" title="Floating point polyline representation.">QVPolylineF</a> polyline;
<a name="l00146"></a>00146         <span class="keywordflow">foreach</span>(QPoint point, *<span class="keyword">this</span>)
<a name="l00147"></a>00147                 {
<a name="l00148"></a>00148                 polyline.append(QPointF(point));
<a name="l00149"></a>00149                 }
<a name="l00150"></a>00150         <span class="keywordflow">return</span> polyline;
<a name="l00151"></a>00151         }
<a name="l00152"></a>00152 
<a name="l00153"></a>00153 std::ostream&amp; operator &lt;&lt; ( std::ostream &amp;os, <span class="keyword">const</span> <a class="code" href="classQVPolyline.html" title="Polyline representation.">QVPolyline</a> &amp;polyline)
<a name="l00154"></a>00154         {
<a name="l00155"></a>00155         <span class="keyword">const</span> <span class="keywordtype">int</span> size = polyline.size();
<a name="l00156"></a>00156 
<a name="l00157"></a>00157         os &lt;&lt; <span class="stringliteral">&quot;QVPolyline (&quot;</span> &lt;&lt; size &lt;&lt; <span class="stringliteral">&quot;)&quot;</span> ;
<a name="l00158"></a>00158 
<a name="l00159"></a>00159         os &lt;&lt; <span class="stringliteral">&quot; [&quot;</span> ;
<a name="l00160"></a>00160         <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=0; i &lt; size; i++)
<a name="l00161"></a>00161                 {
<a name="l00162"></a>00162                 os &lt;&lt; <span class="stringliteral">&quot; (&quot;</span> &lt;&lt; polyline[i].x() &lt;&lt; <span class="stringliteral">&quot;,&quot;</span> &lt;&lt; polyline[i].y() &lt;&lt; <span class="stringliteral">&quot;)&quot;</span>;
<a name="l00163"></a>00163                 <span class="keywordflow">if</span>(i!=size-1)
<a name="l00164"></a>00164                     os &lt;&lt; <span class="stringliteral">&quot;,&quot;</span>;
<a name="l00165"></a>00165                 <span class="keywordflow">else</span>
<a name="l00166"></a>00166                     os &lt;&lt; <span class="stringliteral">&quot; &quot;</span>;
<a name="l00167"></a>00167                 }
<a name="l00168"></a>00168         os &lt;&lt; <span class="stringliteral">&quot;]&quot;</span> ;
<a name="l00169"></a>00169         <span class="keywordflow">return</span> os;
<a name="l00170"></a>00170         }
</pre></div></div>
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<center><a href="http://perception.inf.um.es/QVision">QVision framework</a>.
<a href="http://perception.inf.um.es">PARP research group</a>.
Copyright &copy; 2007, 2008, 2009, 2010, 2011.</center>
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